tc39/proposal-iterator-helpers resource

Health v2 · maintenance only

Flags: no_releases archived no_license

Adoption not part of the score

1348 stars · 34 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A TC39 ECMAScript language proposal specifying iterator helper methods (map, filter, take, drop, flatMap, reduce, etc.) on the Iterator prototype. The proposal reached Stage 4 and was merged into ECMA-262, so this repository is archived and no longer active.

Use cases

• add map and filter to javascript iterators
• lazily process infinite sequences in javascript
• understand how iterator helpers work in es2025
• read the tc39 spec for iterator.prototype.take
• replace lodash-style iterator utilities with native methods
• learn how tc39 proposals advance through stages

When to choose

• you want to read the original specification text or design rationale for iterator helpers
• you are researching the TC39 process or the history of this proposal

When to avoid

• you want a runnable library or polyfill - use the built-in methods in modern JavaScript runtimes instead
• you need async iterator helpers - those were split into a separate proposal
• you expect active development - the repo is merged and inactive

Facets

learning-resource · maturity abandoned

programming-language interpreter developer-tools programming-languages developer-tools documentation browser cross-platform ecmascript tc39 javascript iterators language-specification stage-4-proposal algorithms nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="tc39/proposal-iterator-helpers")